The shooting lights in the studio don't flash.

1, adjust the shutter speed of the camera to see what is the maximum synchronous flash speed of your camera? For example, 125/ 1 sec, then your camera shutter may not flash if it is opened up. 2. Is there a shield between lights? Remove the defective lamp from the shelf, press the flash test button at the back, try another lamp, and test it repeatedly to see if there is any problem with the lamp. According to the above method, there is something wrong with that lamp. It is very likely that a test bulb tungsten wire behind the lamp is burnt out. Try changing a light bulb after sale. I had this problem with my lamp. Just change it to a light bulb for a few dollars after sale.